Research progress on factors affecting biomechanical strength of pedicle screw internal fixation
10.3760/cma.j.cn121113-20230817-00103
- VernacularTitle:椎弓根螺钉内固定的生物力学强度影响因素的研究进展
- Author:
Yanming FANG
1
;
Da HE
;
Mingxing FAN
;
Qi ZHANG
;
Wei TIAN
Author Information
1. 首都医科大学附属北京积水潭医院脊柱外科，北京 100035
- Keywords:
Pedicle screws;
Bone density;
Biomechanics
- From:
Chinese Journal of Orthopaedics
2024;44(3):193-198
- CountryChina
- Language:Chinese
-
Abstract:
The pedicle screw internal fixation system plays a crucial role in spinal surgery, with the advantage of enhancing spinal stability. However, potential complications such as internal fixation loosening and screw pullout still exist clinically. Currently, pullout of strength is commonly used to evaluate the short-term biomechanical properties of internal fixation, fatigue test is performed to evaluate the long-term biomechanical properties of internal fixation, and torque is used to evaluate the interaction between screws and spinal bone. Factors that influence the biomechanical properties of pedicle screws include spine-related factors (bone density) and screw-related factors (screw size, screw design, and screw augmentation materials). In bones with high bone density, pullout of strength is significantly increased, and fixation strength can also be improved by increasing screw diameter and length, improving screw design, and using screw augmentation materials. Biomechanical research on pedicle screw internal fixation provides key information for achieving individualized and functional optimal channel selection. Designing screw channels with optimal fixation strength is expected to reduce the risk of screw loosening and the occurrence of surgical complications, and improve surgical effects.
